Diffuser for lighting fixture



FIG. 1 is a perspective view of the diffuser for lighting fixture showing the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for a diffuser for lighting fixture, as shown and described. 